SF6 gas density relay with high stability and gas leakage prevention

Abstract

The utility model discloses an SF6 gas density relay with high stability and gas leakage prevention. The SF6 gas density relay comprises an outer shell, a machine core installed in the outer shell and a pointer connected with the machine core. The device is characterized in that the outer shell comprises a front shell and a rear shell integrated with the front shell; a base with an integrated structure is mounted in the front shell; and a sensor convenient to mount and dismount is mounted at one end of the base. According to the utility model, the base is of an integrated structure, so that the situation of gas leakage caused by welding is reduced, the sealing performance of the base is improved, and the stability and accuracy of relay monitoring are improved; the sensor is detachably installed in the rear shell through the threads and connected with one end of the base, when the sensor is damaged, only the sensor needs to be replaced, the whole sensor does not need to be replaced, therefore, the use cost is reduced, meanwhile, the sensor is prevented from being soaked in oil for a long time, and the service life is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to a gas density relay technical field, specifically point to a kind of high stability SF6 gas density relay of air leakage prevention. BACKGROUND

[0002] SF6 density relay is important protection and control element in power system, guarantee the reliability of circuit breaker operation, monitor the various indexes of circuit breaker, especially SF6 gas, must reach the provision of relevant standard, make SF6 circuit breaker long-term keep good working condition, but in prior art, sensor in relay and base are connected by welding, welding place is prone to air leakage, thereby reduce the stability and accuracy of monitoring when relay is used, and air leakage will make the pressure in shell increase, easily break the glass cover on shell, reduce the service life, sensor in relay is generally fixed in shell by welding, after sensor is damaged, relay will need to be replaced as a whole, add the cost of use.For this reason, a kind of high stability SF6 gas density relay of air leakage prevention is proposed. SUMMARY

[0003] The utility model discloses a kind of high stability SF6 gas density relays of air leakage prevention to solve above problems.

[0004] To achieve the above purpose, the utility model provides the following technical scheme: a kind of high stability SF6 gas density relay of air leakage prevention, including outer shell, the movement core being installed in outer shell and the pointer being connected with movement core;Its characterized in that the outer shell includes front shell body and the rear shell body of the integrated structure with front shell body;The first integrated structure's base is installed in the front shell body;The base is installed with the sensor of being convenient for installation and disassembly by thread in one end.

[0005] Preferably, the base is provided with an air passage, a connection end connected with the outside and a mounting end connected with the sensor.

[0006] Preferably, the connection end of the base penetrates the front shell body and is connected with the outside, and the mounting end penetrates the front shell body and is connected with the sensor in the rear shell body.

[0007] Preferably, the mounting end is provided with an internal thread for facilitating the installation and disassembly of the sensor and a sealing end face sealed with the sensor.

[0008] Preferably, the connection end is further provided with an external thread.

[0009] The utility model has the beneficial effects that: by adopting the integrated structure of the base, the air leakage caused by welding is reduced, the sealing property of the base is improved, and the stability and accuracy of the relay monitoring are improved.

[0010] By detachably mounting the sensor in the rear shell through screw thread and connecting with one end of the base, only the sensor needs to be replaced when the sensor is damaged, the whole does not need to be replaced, thereby reducing the cost of use, and meanwhile, the sensor is avoided from being soaked in oil for a long time, and the service life is improved. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 is a structural schematic view of the utility model.

[0012] Figure 2 is a partial schematic view of the utility model.

[0013] Figure 3 is a partial structural schematic view of another view of the utility model.

[0014] Figure 4 is a structural schematic view of the base of the utility model.

[0015] Legend: 1, outer shell; 101, front shell; 102, rear shell; 2, movement; 3, pointer; 4, base; 401, air passage; 402, connecting end; 403, mounting end; 404, internal thread; 405, sealing end face; 406, external thread; 5, sensor. DETAILED DESCRIPTION

[0016] Below, we combine the drawings to further explain the SF6 gas density relay of high stability of preventing air leakage.

[0017] It should be noted that all directionality indications in the embodiments of the application, such as up, down, left, right, front, back, etc., are only used to explain the relative positional relationship, movement condition, etc. between components in a certain specific posture, such as shown in the drawings, if the specific posture changes, the directionality indications also change accordingly.

[0018] Refer to the drawings Figures 1-4As shown in the figure, the SF6 gas density relay with high stability and air leakage prevention in the embodiment comprises a shell body 1, a core 2 installed in the shell body 1 and a pointer 3 connected with the core 2, characterized in that the shell body 1 comprises a front shell body 101 and a rear shell body 102 in an integral structure with the front shell body 101; the front shell body 101 is installed with a base 4 in an integral structure; one end of the base 4 is installed with a sensor 5 convenient for installation and dismounting; the base 4 is in an integral structure, thereby reducing the air leakage caused by welding, improving the sealing property of the base 4 and further improving the stability and accuracy of the relay monitoring; the sensor 5 is detachably installed in the rear shell body 102 by means of threads and connected with one end of the base 4, so that the sensor 5 can be replaced only when damaged, without the need of overall replacement, thereby reducing the cost of use and avoiding the long-time immersion of the sensor 5 in oil, improving the service life.

[0019] Refer to the attached Figures 2-4 As shown in the figure, the base 4 is provided with an air passage 401, a connecting end 402 connected with the outside and a mounting end 403 connected with the sensor 5; one end of the connecting end 402 of the base 4 penetrates through the front shell body 101 and is connected with the outside, the mounting end 403 penetrates through the front shell body 101 and is connected with the sensor 5 in the rear shell body 102; the mounting end 403 is provided with an inner thread 404 convenient for the installation and dismounting of the sensor 5 and a sealing end face 405 sealed with the sensor 5; the connecting end 402 is further provided with an outer thread 406; the mounting end 403 and the connecting end 402 penetrate through the front shell body 101 and are fixed and sealed by means of laser welding; the sensor 5 is connected with the inner thread 404 on the mounting end 403 of the base 4 by means of threads, thereby facilitating the installation and dismounting of the sensor 5, and the sealing end face 405 on the mounting end 403 is used to seal between the mounting end 403 and the sensor 5, thereby improving the sealing property between the mounting end 403 and the sensor 5.

[0020] The above embodiment is a description of the utility model and not a limitation of the utility model, and any simple transformation of the utility model belongs to the protection scope of the utility model.

Claims

1. A high-stability anti-gas-leak SF6 gas density relay, comprising a shell (1), a movement (2) installed in the shell (1), and a pointer (3) connected with the movement (2); characterized in that The outer shell (1) comprises a front shell (101) and a rear shell (102) which is integrated with the front shell (101); a first integrated base (4) is installed in the front shell (101); a sensor (5) which is convenient to install and dismount is installed at one end of the base (4) through screw thread; the base (4) is provided with a ventilation passage (401), a connecting end (402) which is connected with the outside and a mounting end (403) which is connected with the sensor (5); one end of the connecting end (402) of the base (4) penetrates through the front shell (101) and is connected with the outside, and the mounting end (403) penetrates through the front shell (101) and is located in the rear shell (102) and is connected with the sensor (5).

2. A high stability, gas leak proof SF6 gas density relay as claimed in claim 1, wherein: The mounting end (403) is provided with an inner thread (404) which is convenient for the sensor (5) to install and dismount and a sealing end surface (405) which is sealed between the sensor (5).

3. A high stability, gas leak proof SF6 gas density relay as claimed in claim 1, wherein: The connecting end (402) is further provided with an outer thread (406).

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